2fdbf42f98
Syncing latest libbpf commits from kernel repository. Baseline bpf-next commit: dda18a5c0b75461d1ed228f80b59c67434b8d601 Checkpoint bpf-next commit: 9a25c1df24a6fea9dc79eec950453c4e00f707fd Baseline bpf commit: f85c1598ddfe83f61d0656bd1d2025fa3b148b99 Checkpoint bpf commit: bdc48fa11e46f867ea4d75fa59ee87a7f48be144 Alexei Starovoitov (1): tools/bpf: sync bpf.h Andrii Nakryiko (3): bpf: Implement BPF ring buffer and verifier support for it libbpf: Add BPF ring buffer support libbpf: Add _GNU_SOURCE for reallocarray to ringbuf.c David Ahern (3): bpf: Add support to attach bpf program to a devmap entry xdp: Add xdp_txq_info to xdp_buff libbpf: Add SEC name for xdp programs attached to device map Eelco Chaudron (2): libbpf: Add API to consume the perf ring buffer content libbpf: Fix perf_buffer__free() API for sparse allocs Jakub Sitnicki (2): bpf: Add link-based BPF program attachment to network namespace libbpf: Add support for bpf_link-based netns attachment John Fastabend (1): bpf, sk_msg: Add get socket storage helpers include/uapi/linux/bpf.h | 95 ++++++++++++- src/libbpf.c | 49 ++++++- src/libbpf.h | 24 ++++ src/libbpf.map | 7 + src/libbpf_probes.c | 5 + src/ringbuf.c | 288 +++++++++++++++++++++++++++++++++++++++ 6 files changed, 461 insertions(+), 7 deletions(-) create mode 100644 src/ringbuf.c -- 2.24.1
This is a mirror of bpf-next linux tree's
tools/lib/bpf directory plus its supporting header files.
The following files will by sync'ed with bpf-next repo:
src/<->bpf-next/tools/lib/bpf/include/uapi/linux/bpf_common.h<->bpf-next/tools/include/uapi/linux/bpf_common.hinclude/uapi/linux/bpf.h<->bpf-next/tools/include/uapi/linux/bpf.hinclude/uapi/linux/btf.h<->bpf-next/tools/include/uapi/linux/btf.hinclude/uapi/linux/if_link.h<->bpf-next/tools/include/uapi/linux/if_link.hinclude/uapi/linux/if_xdp.h<->bpf-next/tools/include/uapi/linux/if_xdp.hinclude/uapi/linux/netlink.h<->bpf-next/tools/include/uapi/linux/netlink.hinclude/tools/libc_compat.h<->bpf-next/tools/include/tools/libc_compat.h
Other header files at this repo (include/linux/*.h) are reduced versions of
their counterpart files at bpf-next's tools/include/linux/*.h to make compilation
successful.
Build
libelf is an internal dependency of libbpf and thus it is required to link
against and must be installed on the system for applications to work.
pkg-config is used by default to find libelf, and the program called can be
overridden with PKG_CONFIG.
If using pkg-config at build time is not desired, it can be disabled by setting
NO_PKG_CONFIG=1 when calling make.
To build both static libbpf.a and shared libbpf.so:
$ cd src
$ make
To build only static libbpf.a library in directory build/ and install them together with libbpf headers in a staging directory root/:
$ cd src
$ mkdir build root
$ BUILD_STATIC_ONLY=y OBJDIR=build DESTDIR=root make install
To build both static libbpf.a and shared libbpf.so against a custom libelf dependency installed in /build/root/ and install them together with libbpf headers in a build directory /build/root/:
$ cd src
$ PKG_CONFIG_PATH=/build/root/lib64/pkgconfig DESTDIR=/build/root make install
Distributions
Distributions packaging libbpf from this mirror:
Benefits of packaging from the mirror over packaging from kernel sources:
- Consistent versioning across distributions.
- No ties to any specific kernel, transparent handling of older kernels. Libbpf is designed to be kernel-agnostic and work across multitude of kernel versions. It has built-in mechanisms to gracefully handle older kernels, that are missing some of the features, by working around or gracefully degrading functionality. Thus libbpf is not tied to a specific kernel version and can/should be packaged and versioned independently.
- Continuous integration testing via TravisCI.
- Static code analysis via LGTM and Coverity.
Package dependencies of libbpf, package names may vary across distros:
- zlib
- libelf
License
This work is dual-licensed under BSD 2-clause license and GNU LGPL v2.1 license. You can choose between one of them if you use this work.
SPDX-License-Identifier: BSD-2-Clause OR LGPL-2.1